* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Arial", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

.navbar {
  background: rgba(255, 255, 255, 0);
  box-shadow: none;
  position: fixed;
  top: 0;
  z-index: 1000;
  width: 100%;
  transition: all 0.25s ease;
}

/* 透明状态样式 - 修复后 */
.navbar.navbar-transparent {
  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease;
  background-color: transparent;
}

.navbar.navbar-transparent .nav-link {
  color: #ffffff !important;
}

.navbar.navbar-transparent .hamburger span {
  background: #ffffff !important;
}

/* 滚动状态样式 */
.navbar.navbar-scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

.navbar.navbar-scrolled .nav-link {
  color: #4a5568 !important;
}

.navbar.navbar-scrolled .hamburger span {
  background: #e60000 !important;
}

.navbar.navbar-scrolled .nav-link:hover {
  color: #e60000 !important;
  background-color: #fff2f2;
}

/* 菜单激活状态样式 - 修复透明度一致性 */
.navbar.navbar-menu-active {
  background: rgba(255, 255, 255, 0.95) !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
  backdrop-filter: blur(10px) !important;
}

.navbar.navbar-menu-active .nav-link {
  color: #4a5568 !important;
}

.navbar.navbar-menu-active .hamburger span {
  background: #e60000 !important;
}

/* 修复移动端菜单打开后链接悬停效果 */
.navbar.navbar-menu-active .nav-link:hover {
  color: #e60000 !important;
  background-color: #fff2f2;
}

.nav-container {
  max-width: 100%;
  width: 100%;
  margin: 0;
  padding: 0 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  margin-left: 0;
}

.logo-image {
  height: 40px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  margin-right: 0;
}

.nav-item {
  position: relative;
  margin: 0 5px;
}

.nav-link {
  display: block;
  padding: 10px 20px;
  text-decoration: none;
  color: #ffffff;
  font-weight: 500;
  transition: all 0.25s ease;
  border-radius: 4px;
  position: relative;
}

.nav-link:hover {
  color: #e60000;
  background-color: rgba(255, 242, 242, 0.1);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: #e60000;
  transition: all 0.25s ease;
  transform: translateX(-50%);
}

.nav-item:hover .nav-link::after {
  width: 80%;
}

/* 白色背景全屏三级菜单 */
.mega-menu {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: #ffffff;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.25s ease;
  z-index: 999;
  padding-top: 0;
  margin-top: -1px;
}

.nav-item.mega-active .mega-menu,
.nav-item:hover .mega-menu,
.mega-menu:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-menu-wrapper {
  background: #fff;
  width: 100%;
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.mega-menu-content {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 40px;
  display: grid;
  grid-template-columns: 260px 260px 260px;
  gap: 0px;
  min-height: 500px;
  color: #4a5568;
  align-items: flex-start;
  justify-content: center;
}

@media (min-width: 1440px) {
  .mega-menu-content {
      max-width: 1000px;
      grid-template-columns: 280px 280px 280px;
      gap: 0px;
  }
}

@media (min-width: 1600px) {
  .mega-menu-content {
      max-width: 1100px;
      grid-template-columns: 300px 300px 300px;
      gap: 0px;
  }
}

@media (max-width: 1200px) {
  .mega-menu-content {
      max-width: 95%;
      grid-template-columns: 220px 220px 220px;
      gap: 0px;
  }
}

/* 移动导航箭头和返回按钮 */
.mobile-arrow, .mobile-back {
  display: none;
}

/* 移动端样式 */
@media (max-width: 768px) {
  /* 透明状态样式 */
  .navbar.navbar-transparent {
    background: rgba(255, 255, 255, 0) !important;
  }
  
  .navbar.navbar-transparent .nav-link {
    color: #ffffff !important;
  }

  /* 滚动状态样式 */
  .navbar.navbar-scrolled {
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
  }
  
  .navbar.navbar-scrolled .nav-link {
    color: #333 !important;
  }

  /* 菜单激活状态样式 - 完全不透明 */
  .navbar.navbar-menu-active {
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
    backdrop-filter: blur(10px) !important;
  }
  
  .navbar.navbar-menu-active .nav-link {
    color: #333 !important;
  }

  /* 移动端汉堡菜单颜色控制 */
  .navbar.navbar-transparent .hamburger span {
    background: #ffffff !important;
  }

  .navbar.navbar-scrolled .hamburger span {
    background: #e60000 !important;
  }

  .navbar.navbar-menu-active .hamburger span {
    background: #e60000 !important;
  }
  
  /* 确保移动端返回按钮样式正确 */
  .mobile-back {
    display: inline-block;
    font-size: 14px;
    color: #e60000;
    margin-left: 10px;
    cursor: pointer;
    font-weight: normal;
  }
  
  .mobile-arrow {
    /* display: inline-block; */
    float: right;
    font-size: 18px;
    color: #e60000;
  }

  .hamburger {
      display: flex !important;
      flex-direction: column;
      width: 45px;
      height: 45px;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      z-index: 1002;
      background: none;
      border: none;
      padding: 10px;
      margin-right: -10px;
  }

  .hamburger span {
      width: 25px;
      height: 3px;
      margin: 3px 0;
      transition: 0.25s;
      border-radius: 2px;
      display: block;
  }

  .hamburger.active span:nth-child(2) {
      opacity: 0;
  }

  .hamburger.active span:nth-child(1) {
      transform: translateY(9px) rotate(45deg);
  }

  .hamburger.active span:nth-child(3) {
      transform: translateY(-9px) rotate(-45deg);
  }

  .nav-menu {
      position: fixed;
      left: -100%;
      top: 70px;
      flex-direction: column;
      background-color: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(10px);
      width: 100%;
      text-align: left;
      transition: 0.25s;
      box-shadow: 0 10px 27px rgba(0, 0, 0, 0.1);
      height: calc(100vh - 70px);
      overflow-y: auto;
      z-index: 1001;
      padding: 0;
  }

  .nav-menu.active {
      left: 0 !important;
  }

  .nav-item {
      margin: 0;
      border-bottom: 1px solid rgba(240, 240, 240, 0.5);
  }

  .nav-menu .nav-link {
      padding: 15px 20px;
      font-size: 16px;
      color: #333 !important;
      font-weight: 500;
  }

  .nav-item:hover .nav-link::after,
  .nav-link::after {
      display: none;
  }

  .nav-menu .nav-link:hover {
      background: rgba(230, 0, 0, 0.1);
      color: #333 !important;
  }

  .mega-menu {
      position: static;
      top: auto;
      left: auto;
      width: 100%;
      box-shadow: none;
      border-top: none;
      padding: 0;
      margin: 0;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      opacity: 1;
      visibility: hidden;
      transform: none;
      display: block;
      pointer-events: none;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(5px);
  }

  .nav-item.mega-active .mega-menu {
      max-height: 2000px;
      visibility: visible;
      pointer-events: all;
  }

  .mega-menu-wrapper {
      box-shadow: none;
      background: transparent;
  }

  .mega-menu-content {
      grid-template-columns: 1fr;
      padding: 0;
      min-height: auto;
      gap: 0;
      max-width: 100%;
  }

  .level-1-menu,
  .level-2-menu,
  .level-3-menu {
      background: transparent;
      border-radius: 0;
      margin-bottom: 0;
      border: none;
      height: auto;
      padding: 0;
      border-right: none;
      display: none;
      opacity: 0;
      transform: translateY(-10px);
      transition: all 0.3s ease;
  }

  .level-1-menu.active,
  .level-2-menu.active,
  .level-3-menu.active {
      display: block;
      opacity: 1;
      transform: translateY(0);
  }

  .level-1-menu h3,
  .level-2-menu h4,
  .level-3-menu h5 {
      display: none;
  }

  .level-1-item,
  .level-2-item,
  .level-3-item {
      padding: 15px 20px;
      position: relative;
      display: block;
      width: 100%;
      color: #333 !important;
      border-bottom: 1px solid rgba(245, 245, 245, 0.5);
      text-decoration: none;
      font-size: 15px;
      transition: all 0.25s ease;
      border-left: none;
      background: rgba(255, 255, 255, 0.3);
      margin-bottom: 1px;
  }

  /* 移动端菜单层级缩进 */
  .level-2-item {
      padding-left: 35px;
      background: rgba(248, 250, 252, 0.5);
      font-size: 14px;
  }

  .level-3-item {
      padding-left: 50px;
      background: rgba(241, 245, 249, 0.5);
      font-size: 13px;
  }

  .level-1-item.active,
  .level-2-item.active,
  .level-3-item.active {
      background-color: rgba(249, 249, 249, 0.9);
      color: #333 !important;
      border-left: 3px solid #e60000;
      box-shadow: 0 2px 8px rgba(230, 0, 0, 0.1);
  }

  .level-1-item.active {
      padding-left: 17px;
  }

  .level-2-item.active {
      padding-left: 32px;
  }

  .level-3-item.active {
      padding-left: 47px;
  }

  .level-1-item::after,
  .level-2-item::after,
  .level-3-item::after {
      display: none;
  }

  .mega-menu::before {
      display: none;
  }

  .nav-link.has-submenu {
      position: relative;
      padding-right: 40px;
  }

  .nav-link.has-submenu::after {
      content: "+";
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 20px;
      color: #333 !important;
      transition: all 0.25s ease;
  }

  .nav-link.has-submenu.active::after {
      content: "-";
      color: #333 !important;
  }

  .menu-details,
  .wall-details-container {
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(5px);
      border-radius: 0;
      margin: 0;
      border: none;
      padding: 15px;
      border-top: 1px solid rgba(245, 245, 245, 0.5);
  }

  .menu-details {
      display: none !important;
  }

  .menu-details.active {
      display: none !important;
  }

  .wall-details-container {
      display: none !important;
  }

  .wall-details-container.active {
      display: none !important;
  }

  /* 完全隐藏移动端的产品详情内容 */
  .wall-details {
      display: none !important;
  }

  /* 隐藏产品详情的所有元素 */
  .menu-details p,
  .wall-details p,
  .menu-details h3,
  .wall-details h3,
  .details-btn {
      display: none !important;
  }

  .product-image {
      display: none !important;
  }

  /* 完全隐藏移动端产品详情相关元素 */
  .menu-details .product-image,
  .wall-details .product-image,
  .product-image::before,
  .product-image::after {
      display: none !important;
  }

  /* 确保产品详情区域在移动端的简洁显示 */
  .menu-details,
  .wall-details {
      padding-top: 15px;
  }

  .menu-details p,
  .wall-details p {
      margin-top: 0;
  }

  .details-btn {
      width: 100%;
      text-align: center;
      padding: 12px;
      background: #e60000;
      color: white;
      border-radius: 6px;
      font-weight: 500;
      margin-top: 15px;
      display: block;
      text-decoration: none;
      box-shadow: 0 2px 8px rgba(230, 0, 0, 0.2);
      transition: all 0.25s ease;
  }

  .details-btn:hover {
      background: #cc0000;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(230, 0, 0, 0.3);
  }

  .menu-details h3,
  .wall-details h3 {
      font-size: 16px;
      margin-bottom: 10px;
      color: #333;
  }

  /* 移动端隐藏所有装饰性元素 */
  .menu-details .features,
  .wall-details .features {
      display: none;
  }

  /* 简化移动端产品详情布局 */
  .menu-details p,
  .wall-details p {
      margin: 10px 0;
      font-size: 14px;
      line-height: 1.5;
      color: #666;
  }
}

/* 一级菜单列 */
.level-1-menu {
  background: #ffffff;
  border-radius: 12px 0 0 12px;
  padding: 10px 0;
  border-right: 1px solid #e2e8f0;
  height: 100%;
  box-sizing: border-box;
}

.level-1-menu h3 {
  font-size: 18px;
  margin: 0 20px 20px;
  color: #e60000;
  border-bottom: 2px solid #ffcccc;
  padding-bottom: 10px;
  font-weight: 600;
}

.level-1-item {
  display: block;
  padding: 15px 20px;
  color: #4a5568;
  text-decoration: none;
  transition: all 0.25s ease;
  border-left: 3px solid transparent;
  position: relative;
  margin: 0;
  line-height: 20px;
}

.level-1-item:hover,
.level-1-item.active {
  background: #fff2f2;
  color: #e60000;
  border-left-color: #e60000;
  box-shadow: 0 2px 8px rgba(230, 0, 0, 0.1);
  padding-left: 25px;
}

.level-1-item::after {
  content: "›";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: all 0.25s ease;
  color: #e60000;
}

.level-1-item:hover::after,
.level-1-item.active::after {
  opacity: 1;
  right: 10px;
}

/* 二级菜单列 */
.level-2-menu {
  background: #ffffff;
  padding: 10px 0;
  display: none;
  border-right: 1px solid #e2e8f0;
  height: 100%;
  box-sizing: border-box;
}

.level-2-menu.active {
  display: block;
}

.level-2-menu h4 {
  font-size: 16px;
  margin: 0 20px 20px;
  color: #e60000;
  border-bottom: 1px solid #ffcccc;
  padding-bottom: 10px;
  font-weight: 600;
}

.level-2-item {
  display: block;
  padding: 15px 20px;
  color: #4a5568;
  text-decoration: none;
  transition: all 0.25s ease;
  border-left: 3px solid transparent;
  position: relative;
  margin: 0;
  line-height: 20px;
}

.level-2-item:hover,
.level-2-item.active {
  background: #fff2f2;
  color: #e60000;
  border-left-color: #e60000;
  box-shadow: 0 2px 8px rgba(230, 0, 0, 0.1);
  padding-left: 25px;
}

.level-2-item::after {
  content: "›";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: all 0.25s ease;
  color: #e60000;
}

.level-2-item:hover::after,
.level-2-item.active::after {
  opacity: 1;
  right: 10px;
}

/* 三级菜单列 */
.level-3-menu {
  background: #ffffff;
  padding: 10px 0;
  display: none;
  border-right: 1px solid #e2e8f0;
  height: 100%;
  box-sizing: border-box;
}

.level-3-menu.active {
  display: block;
}

.level-3-menu h5 {
  font-size: 14px;
  margin: 0 20px 20px;
  color: #e60000;
  border-bottom: 1px solid #ffcccc;
  padding-bottom: 10px;
  font-weight: 600;
}

.level-3-item {
  display: block;
  padding: 15px 20px;
  color: #4a5568;
  text-decoration: none;
  transition: all 0.25s ease;
  border-left: 3px solid transparent;
  position: relative;
  margin: 0;
  line-height: 20px;
}

.level-3-item:hover,
.level-3-item.active {
  background: #fff2f2;
  color: #e60000;
  border-left-color: #e60000;
  box-shadow: 0 2px 8px rgba(230, 0, 0, 0.1);
  padding-left: 25px;
}

.level-3-item::after {
  content: "›";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: all 0.25s ease;
  color: #e60000;
}

.level-3-item:hover::after,
.level-3-item.active::after {
  opacity: 1;
  right: 10px;
}

/* 详情展示区 */
.menu-details {
  background: #ffffff;
  border-radius: 0 12px 12px 0;
  padding: 40px;
  display: none !important;
  border-left: 1px solid #e2e8f0;
}

.menu-details.active {
  display: none !important;
}

/* 墙板详情区样式 */
.wall-details-container {
  display: none !important;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  padding: 30px;
  background: #ffffff;
  border-radius: 0 12px 12px 12px;
  margin-left: 0;
  z-index: 999;
  position: relative;
  pointer-events: auto;
}


.wall-details:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.menu-details h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: #e60000;
  font-weight: 600;
  display: none !important;
}

.menu-details p {
  margin-bottom: 20px;
  line-height: 1.8;
  color: #4a5568;
  display: none !important;
}

.menu-details .features {
  margin: 25px 0;
  display: none !important;
}

.menu-details .features h4 {
  font-size: 16px;
  margin-bottom: 15px;
  color: #2c5282;
  font-weight: 600;
  display: none !important;
}

.menu-details .features ul {
  list-style: none;
  display: none !important;
}

.menu-details .features li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  color: #4a5568;
  display: none !important;
}

.menu-details .features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #e60000;
  font-weight: bold;
  display: none !important;
}

/* 产品图片基础样式 */
.product-image {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  box-shadow: none !important;
}

.product-image::after {
  display: none !important;
  content: none !important;
}

/* 每个产品的特定背景 */
#spc-4mm-details .product-image,
#spc-5mm-details .product-image,
#spc-6mm-details .product-image,
#pvc-wall-details .product-image,
#decorative-3d-details .product-image {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  box-shadow: none !important;
  background: none !important;
}

.details-btn {
  background: linear-gradient(135deg, #e60000 0%, #ff3333 100%);
  color: white;
  padding: 12px 24px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.25s ease;
  display: inline-block;
  margin-top: 20px;
}

.details-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(230, 0, 0, 0.3);
  background: linear-gradient(135deg, #ff3333 0%, #ff6666 100%);
}

.cta-button {
  background: linear-gradient(135deg, #e60000 0%, #cc0000 100%);
  color: white !important;
  padding: 12px 24px !important;
  border-radius: 25px;
  font-weight: 600;
  transition: all 0.25s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 14px;
}

.cta-button:hover {
  background-color: #ff1a1a;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(230, 0, 0, 0.3);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  background: none;
  border: none;
  padding: 10px;
  z-index: 1002;
  margin-right: -10px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  margin: 3px 0;
  transition: 0.25s;
  border-radius: 2px;
  display: block;
}

.demo-content {
  padding: 120px 20px 60px;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: white;
}

.demo-content h1 {
  color: #ffffff;
  margin-bottom: 20px;
  font-size: 2.5em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.demo-content p {
  color: #ffffff;
  font-size: 1.1em;
  margin-bottom: 15px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* 不同菜单的顶部装饰条 */
.products-mega {
  border-top-color: #e60000;
}

.solutions-mega {
  border-top-color: #ff3333;
}

.support-mega {
  border-top-color: #cc0000;
}

/* 遮罩层，用于覆盖页面其他部分 */
.mega-menu::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: -1;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.nav-item:hover .mega-menu::before,
.nav-item.mega-active .mega-menu::before {
  opacity: 1;
}

/* 墙板详情区域图片样式 */
.wall-details .product-image {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  box-shadow: none !important;
  background: none !important;
}

/* 添加一些额外的演示内容 */
.content-section {
  padding: 100px 20px;
  text-align: center;
  background: #ffffff;
  color: #333;
}

.content-section h2 {
  font-size: 2em;
  margin-bottom: 20px;
  color: #e60000;
}

.content-section p {
  font-size: 1.1em;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
  color: #4a5568;
}


/* 底部CSS代码 nav-button.js */

/* 底部灰色栏 */

.main-content {
  flex: 1;
  padding: 40px 20px;
  text-align: center;
  color: #666;
}

/* Footer 样式 */
.footer {
  margin-top: 30px;
  background-color: #61696D;
  color: #CCCCCC;
  padding: 30px 20px 20px 20px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* 桌面端布局：导航栏 + 二维码 */
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  /* margin-top: 5px; */
  margin-bottom: 30px;
}

.footer-nav {
  display: flex;
  gap: 80px;
  flex: 1;
}

.nav-column {
  flex: 1;
}

.nav-title {
  font-size: 16px;
  font-weight: 600;
  color: #ABABAB;
  margin-bottom: 15px;
  text-align: left;
}

.nav-title a {
  color: #ABABAB;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-title a:hover {
  color: #ffffff;
}

.nav-items {
  list-style: none;
}

.nav-items li {
  margin-bottom: 8px;
  text-align: left;
}

.nav-items a {
  color: #ababab;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

.nav-items a:hover {
  color: #ffffff;
}

/* 二维码区域 */
.qr-code-section {
  margin-left: 40px;
  display: flex;
  align-items: flex-start;
}

.qr-code {
  width: 100px;
  height: 100px;
  background-color: #ffffff;
  border: 2px solid #ABABAB;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.qr-code img {
  width: 90px;
  height: 90px;
  object-fit: cover;
}

.qr-placeholder {
  width: 80px;
  height: 80px;
  background: repeating-linear-gradient(
      0deg,
      #000 0px,
      #000 2px,
      #fff 2px,
      #fff 4px
  );
  
  background-size: 4px 4px;
}

/* 手机端导航栏（横向排列） */
.mobile-nav {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.mobile-nav-item {
  font-size: 16px;
  color: #CCCCCC;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.mobile-nav-item:hover {
  color: #ffffff;
}

/* 手机端二维码（居中悬浮） */
.mobile-qr-section {
  display: none;
  justify-content: center;
  margin-bottom: 16px;
}

.mobile-qr-code {
  width: 120px;
  height: 120px;
  background-color: #ffffff;
  border: 2px solid #ABABAB;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.mobile-qr-code img {
  width: 110px;
  height: 110px;
  object-fit: cover;
}

.mobile-qr-placeholder {
  width: 100px;
  height: 100px;
  background: repeating-linear-gradient(
      0deg,
      #000 0px,
      #000 2px,
      #fff 2px,
      #fff 4px
  );
  background-size: 4px 4px;
}

/* 分隔线 */
.footer-divider {
  height: 1px;
  background-color: #999A9B;
  margin: 0 -20px 20px -20px;
  width: calc(100% + 40px);
}

/* 下半区：版权信息 */
.footer-bottom {
  text-align: center;
}

.copyright-info {
  font-size: 14px;
  line-height: 1.8;
  color: #CCCCCC;
}
.copyright-info a{
  color: #ccc;
  text-decoration: none;
}

.copyright-info p {
  margin-bottom: 12px;
}

.copyright-info p:last-child {
  margin-bottom: 0;
}

/* 手机端响应式设计 */
@media (max-width: 768px) {
  /* 隐藏桌面端布局 */
  .footer-top {
      display: none;
  }

  /* 显示手机端布局 */
  .mobile-nav {
      display: flex;
  }

  .mobile-qr-section {
      display: flex;
  }

  .footer {
      padding: 24px 16px 20px 16px;
  }

  /* 分割线在手机端的样式 */
  .footer-divider {
      margin: 0 -16px 20px -16px;
      width: calc(100% + 32px);
  }

  /* 调整字号适配小屏幕 */
  .mobile-nav-item {
      font-size: 16px;
  }

  .copyright-info {
      font-size: 14px;
      line-height: 1.8;
  }

  .copyright-info p {
      margin-bottom: 12px;
  }
}

/* 超小屏幕适配 */
@media (max-width: 480px) {
  .mobile-nav {
      gap: 12px;
  }

  .mobile-nav-item {
      font-size: 15px;
  }

  .mobile-qr-code {
      width: 100px;
      height: 100px;
  }

  .mobile-qr-placeholder {
      width: 80px;
      height: 80px;
  }

  .copyright-info {
      font-size: 13px;
  }
}

/* 极小屏幕（竖向双列排布导航） */
@media (max-width: 360px) {
  .mobile-nav {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .mobile-nav-item {
    padding: 8px;
    font-size: 11px;
  }
}